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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#665515#7900. Gifts from Knowledgeqzez#WA 35ms59568kbC++141.1kb2024-10-22 13:46:442024-10-22 13:46:46

Judging History

你现在查看的是最新测评结果

  • [2024-10-22 13:46:46]
  • 评测
  • 测评结果:WA
  • 用时:35ms
  • 内存:59568kb
  • [2024-10-22 13:46:44]
  • 提交

answer

#include<bits/stdc++.h>
#define LB lower_bound
using namespace std;using ll=long long;
const int N=1e6+5,mod=1e9+7;
int n,m;
string A[N];
vector<int> S[N];
int fa[N*2];
int GF(int x){return fa[x]^x?fa[x]=GF(fa[x]):x;}
void merge(int x,int y){
	fa[GF(x)]=GF(y);
}
void Solve(){
	scanf("%d%d",&n,&m);
	for(int i=1;i<=n;i++) cin>>A[i];
	iota(fa+1,fa+2*n+1,1);
	for(int i=0;i<m;i++) S[i].clear();
	for(int i=1;i<=n;i++){
		for(int j=0;j<m&&j<=m-j-1;j++)if(A[i][j]=='1'||A[i][m-j-1]=='1') S[j].push_back(i);
	}
	for(int i=0;i<m&&i<=m-i-1;i++){
		if(S[i].size()>2){puts("0");return;}
		if(S[i].size()<=1) continue;
		int x=S[i][0],y=S[i][1];
		for(int j:{x,y}){
			if(A[j][i]=='1'&&A[j][m-i-1]=='1'){
				puts("0");return;
			}
		}
		if(A[x][i]==A[y][i]) merge(x,y+n),merge(x,y+n);
		else merge(x,y),merge(x+n,y+n);
	}
	for(int i=1;i<=n;i++) if(GF(i)==GF(i+n)){puts("0");return;}
	int cnt=0;
	for(int i=1;i<=2*n;i++) if(fa[i]==i) cnt++;
	cnt>>=1;
	ll ans=1;
	for(int i=1;i<=cnt;i++) ans=ans*2%mod;
	printf("%lld\n",ans);
}
int main(){
	int t=1;
	scanf("%d",&t);
	while(t--) Solve();
	return 0;
}

Details

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Test #1:

score: 100
Accepted
time: 8ms
memory: 58792kb

input:

3
3 5
01100
10001
00010
2 1
1
1
2 3
001
001

output:

4
0
2

result:

ok 3 number(s): "4 0 2"

Test #2:

score: 0
Accepted
time: 33ms
memory: 58452kb

input:

15613
10 10
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
0000000000
15 8
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
00000000
1 5
00000
5 9
000000000
000000000
0000...

output:

1024
32768
2
32
32768
128
32
16
16
2
16384
16384
128
128
32768
8192
128
64
16384
2
4
2
4096
16
4096
1024
32768
32768
16384
8
128
2
16
4096
8192
32768
8192
8192
16
16384
16384
256
128
8
256
8
4096
512
2
4
32
32
2
64
512
1024
32768
32768
2
64
16384
16
8192
16
256
16
64
8192
8192
64
1024
2
32768
2
4
51...

result:

ok 15613 numbers

Test #3:

score: -100
Wrong Answer
time: 35ms
memory: 59568kb

input:

15759
9 6
000000
000000
000000
000000
000000
000000
000000
000000
000000
5 15
010000000000000
000000000000000
000000000000000
000100000000000
000100000000000
14 12
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000000000
000000...

output:

512
16
16384
512
1024
4096
32768
4
2
512
512
512
512
8
2
256
16
4096
512
64
16
4096
512
32
32768
8192
32
2048
128
16
4096
64
32768
256
32
16384
8
512
32
2048
8
16
1024
2048
128
64
32
8
512
8
8192
256
8192
32768
2
8
512
512
256
32
2
2048
8192
8
64
8
2
16384
32768
32768
1024
4096
16384
16384
128
256
4...

result:

wrong answer 462nd numbers differ - expected: '8192', found: '16384'